package com.git.bcs.common.bean.holder;

import org.springframework.beans.BeansException;
import org.springframework.context.ApplicationContext;
import org.springframework.stereotype.Component;
import org.springframework.context.ApplicationContextAware;


@Component
public class SpringContextHolder implements ApplicationContextAware{

	 private static ApplicationContext applicationContext;

	    @Override
	    public void setApplicationContext(ApplicationContext applicationContext) throws BeansException {
	        SpringContextHolder.applicationContext = applicationContext;
	    }

	    public static ApplicationContext getApplicationContext() {
	        assertApplicationContext();
	        return applicationContext;
	    }

	    @SuppressWarnings("unchecked")
	    public static <T> T getBean(String beanName) {
	        assertApplicationContext();
	        return (T) applicationContext.getBean(beanName);
	    }

	    public static <T> T getBean(Class<T> requiredType) {
	        assertApplicationContext();
	        return applicationContext.getBean(requiredType);
	    }

	    private static void assertApplicationContext() {
	        if (SpringContextHolder.applicationContext == null) {
	            throw new RuntimeException("applicaitonContext属性为null,请检查是否注入了SpringContextHolder!");
	        }
	    }
}
